Burner



Feb. s, 1938.

B. MATTHEWS Er Al.

BURNER Filed Dec. 28, 19'34 Patented Feb'. 8, 1938v UNITED STATES PATENTOFFICE BURNER Application December 28,1934, Serial No. 759,454

2 Claims.

It is an object of this invention to provide a fluid fuel burner havingvtwo principal parts that determine the size of the burner opening, andwhich size is fixed by two planar surfaces, one

on each part.

The'burner is designed to be of the ribbon flame type, wherein the flamecomprises a continuous band around the periphery of the burner.

A further object is to provide a burner of this l0 type wherein means isprovided to elongate certain ports to prevent flash-back.

A further object consists in lthe manner of manufacturing the burner,such as set out in the accompanying specification, and wherein twoimportant steps consist in providing two principal parts for the burner,forming a single reference surface on each, and using said referencesurfaces as means for determining the dimensions of the burner.

In the drawing:

Fig. l is a section on the line I-I of Fig. 2.

Fig. 2 is avertical section showing one form of burner.

Fig. 3 is a vertical section showing a second form of burner.

Fig. 4 is a sectional view showing a third form of burner.

Referring to the type shown in Figs. 1 and 2, theburner comprises a bowlI0 attached to a mixing tube I I, that may extend out and be controlledby a gas cock or any such valve and a shutter to admit primary air. Thebowl has a central upstanding cylindrical portion I2, and an outer wallI3 terminating in a flange I4, the upper surface of which, as at I5,is'machined to be perfectly fiat. Resting upon surface I5 is a spacingdevice I6 n having spaced prongs thereof extending radially outwardlytherefrom. It is these prongs, here shown as three in number, thatengage the upperl surface I5 of flange I4, the ring portion being spacedback from this flange. fingers I1 is a cap member I8 having a flange I9,the under surface o f which at 20 is manufactured to be smooth andplanar. Thus the spacing of surface 20 from surface I5 is Agovernedentirely by the thickness of fingers I1 of'spacer member I6. Capvmember` I8 has. a depression centrally therein which providessubstantially vertical walls 2|. The depression terminatesin' a verticalcylindrical portion 22 adapted to t within cylindrical. portion I2 ofthe burner bowl. This fit is preferably close", and centralizes the capin the bowl to hold the parts in proper relation. Portion 22 terminatesin a threaded end over which is engaged a locking nut 23 that holds theburner Resting upon the together. It will be seen that a secondary airpassage is provided through cylindrical portion 22. Pressed or otherwisesecured to the cylindrical portion of cap I8 is a ringlike member 24. Inmember 24 and portion 2| is provided a series of outlet ports 25. Ports25 give an inner flame for the burner to cooperate with the ribbonlikeflame supported between surfaces 2l) and I5 to increase the efficiencyof the burner. The use of ring 24 provides an elongated slot at 25 thatreduces the possibilities of the back flash of the ame into the bowl andmixing tube.

f In the construction of this burner the bowl I0 is manufactured andwith a single grinding or other `machine operation, the surface I5 ismade smooth and planar. Cap member I8 may be made by a stamping. In itsmanufacture the surface 20 is made smooth and planar. Thus in theconstruction of the burner there are only two surfaces producable byonly two operations with a single machine adjustment for each; and thesetwo surfaces absolutely fix, with the use of spacer member I6, the sizeof the outer burner slot and also provide the slot itself. It will beseen that the slot is continuous and the pointed fingers I1 are sospaced and dimensioned that the outer flame issued between surfaces 20and I5 will be a continuous ribbon around the burner. It isl for ject todislocation, should such be possible after a pressed t. Furthermore, theburner has better appearance with this element concealed.

With ring member 24 on cap I8, spacer ring I6 is dropped into positionwith the fingers I'l resting on surface I5. Cap member I8 is then putinto position with cylindrical portion 22 extending through cylindricalportion I2 of burner bowl I Ilfand the locking nut 23 is fastened. Itwill be observed that the spacing of the outer burner slot is entirelyunaffected by the degree of tightness of lock` nut `23.

The burner of Fig. 3 is similar to that of Fig. 2. In this burner,however, lugs or bosses 30 extend inwardly from wall I3, and thereshould be aty least'three of these.

At lthe time of the surfacing of surface I5, the upper ends of. lugs 30are simultaneously made coplanar with surface I5, this being done in asingle operation. Cap member Il is pressed or otherwise formed to have alower surface 3l spaced from surface 20 by exactly the desireddimensions of burner slot 32. The surface 3l -f may be provided in thesame stamping operation by which a cap'member I8 is manufactured. Thusin the assembly of this burner the spacer ring I6 is eliminated. Otherthan these noted differences the burner is identical with` the burner inFig. 2.

ber I8, depressions 40 are pressed or otherwise formed in flangeV member4I, these depressions 40Y extending outwardly from the under surface 20by a predetermined distance, which distance is the deciding spacing forslot 42. It will be seen that this burner requires only two machiningoperations to determine the width of the slot opening.

It will be observed that in all of these burners the manufacture of theburner bowl necessitates a singleioperation that requires xeddimension'- ing. The burner bowl may be a single casting with the mixingtube as shown, thus materially simplifying this structur. After the bowlis cast it may be held against a grinding wheel or the like and thesurface l5 made smooth and planar to fix simultaneously the slot surfaceand the reference surface thereof. Where the manumembers may have all oftheir fixed dimensions provided ina single operation, preferably in astampingVY or die-casting machine.

Having described the burners, what isrclalmed 1. A burner comprising abowlY member having an annular planar upper surface of substantial widthand a. centrally located hollow tubular portion, a cap member having aplanar surface of substantial width cooperating with said bowl planarsurface to provide a substantially horizontal annular burner slot, saidcap having a vertical cylindrically recessed central portion extendinginto said bowl to provide an annular passageway in communication withthe burner slot and a cylindrically hollow tubularportion-telescopically fitting said bowl tubular portion, and radiallyVextending spacing means between said planar surfaces, said -rneanshaving their outer extremities positioned a substantial distance inwadlyof the outer edges of said surfaces and tapered to a sharp point in thedirection of flow to permit the free flow of' fuel in a continuous ringadjacent the outer edges of said planar surfaces to provide a continuousflame at the burner slot.

2. A burner comprising a bowl member having' tapered to a sharp pointAin the direction of ow to permit the free iow of fuel in a continuousring adjacent the outer edges of said surfaces to` provide a continuousflame at the burner slot.)

BmcHARD r.. MA'I'rrmws. JOHN T. MAavnv.

